 | |
Micra rear brake load compensator
Cars Maintenance General car maintenance (uk.rec.cars.maintenance)
 |
| | Thread Tools | Search this Thread | Display Modes |
#11
 
| |||
| |||
|
Re: Micra rear brake load compensator -
06-09-2006
, 03:26 AM
|
"curls" <invalid (AT) invalid (DOT) com.org> wrote in message news  q0g82tvhn3jc2vck6277m6tbjf57n90vv (AT) 4ax (DOT) com...On Thu, 8 Jun 2006 11:14:05 +0100, "PC Paul" <me (AT) home (DOT) com> wrote: It's puzzling me why I can bleed them easily enough, and get a good pedal, yet the brakes still won't work. Well, they will very slightly, but it's far from enough. I'm obviously missing something, I just wish I knew what. HFM? I don't know how similar it is the one on my Alfa (a Bendix one) but I can get a new one for about 60quid. |
Quote:
|
To be honest, as long as the piston and the arm are all moving smoothly, I don't see how it would be broke. I'm assuming it's failed on the MOT? On what exactly? Broken linkage? |
else, I put it down to the load compensator.
Quote:
|
When you say the brakes no longer work, do you mean just the rears or the front too? Just the rear. |
#12
| |||
| |||
|
|
The message <oq0g82tvhn3jc2vck6277m6tbjf57n90vv (AT) 4ax (DOT) com from curls <invalid (AT) invalid (DOT) com.org> contains these words: I've got flaring tools, but the guy at the MOT station insists on the genuine item. Eh? It's not his decision. As far as I know, pattern parts aren'y yet outlawed. Provided it's secure and not leaking it's not is problem. |
I meant there doesn't appear to be a pattern part available. Badly
worded on my part.
#13
| |||
| |||
|
|
curls wrote: It's puzzling me why I can bleed them easily enough, and get a good pedal, yet the brakes still won't work. Well, they will very slightly, but it's far from enough. I'm obviously missing something, I just wish I knew what. It's not just because you've got the rear suspension unloaded is it? If you have the wheels dangling free then the brake compesator should just about cut off all the braking. |
the body, with and without the arm in place, with the valve plungers
held at various positions. No change at all.
#14
| |||
| |||
|
|
The message <ttsf82tilu48085ucgl10tpvrh2d7fe6tl (AT) 4ax (DOT) com from curls <invalid (AT) invalid (DOT) com.org> contains these words: What's the usual plan of action when these things stop working? Generally get hold of the actuating lever and waggle it up and down for a few minutes. |
controlling the plungers/push rods - whatever they are called - hold
the plungers fully in, so waggling the lever while the car is stood
will have no effect. It seems to me that pressure from the brake pedal
will push the plungers down - they are fully in normally - then the
attitude of the car, and hence the lever, will affect how far down the
plungers can travel. So, if I'm right, and uncouple the lever, the
brakes should work as if the compensator isn't there. But it ain't
happening.
#15
| |||
| |||
|
|
On Thu, 8 Jun 2006 19:46:48 +0100, Guy King <guy.king (AT) zetnet (DOT) co.uk wrote: The message <ttsf82tilu48085ucgl10tpvrh2d7fe6tl (AT) 4ax (DOT) com from curls <invalid (AT) invalid (DOT) com.org> contains these words: What's the usual plan of action when these things stop working? Generally get hold of the actuating lever and waggle it up and down for a few minutes. I'm a little unsure about how it actually works. The springs inside, controlling the plungers/push rods - whatever they are called - hold the plungers fully in, so waggling the lever while the car is stood will have no effect. It seems to me that pressure from the brake pedal will push the plungers down - they are fully in normally - then the attitude of the car, and hence the lever, will affect how far down the plungers can travel. So, if I'm right, and uncouple the lever, the brakes should work as if the compensator isn't there. But it ain't happening. |
correct me if im wrong but dont the master cylinder operate the wheels two
at a time?
ie.. the master cylinder has two pistons... each piston operates two wheels?
maybe the seals on one piston are starting to go. thus it pushes fluid when
bleeding but not when under pressure?
so the good cylinder gives the peddle firmness when it stops two wheels but
will not work on the others??
is there anyway he/she could check the pressure of the fluid whilst
breaking??
#16
| |||
| |||
|
|
On Thu, 8 Jun 2006 13:25:17 +0100, "MikeL" <aaaa (AT) nowhere (DOT) com> wrote: HFM? I don't know how similar it is the one on my Alfa (a Bendix one) but I can get a new one for about 60quid. That doesn't help for a Micra though. |
Quote:
| It failed on the rear brakes not working. After checking everything else, I put it down to the load compensator. |
fluid out of the rear calipers/drums then? If so, IMO I'd be thinking that
the valve is fine and the problem is elsewhere.
If you're still convinced it's the valve, perhaps it's worth bypassing it
temporarily with some made up pipes just as a test.
#17
| |||
| |||
|
|
I'm a little unsure about how it actually works. The springs inside, controlling the plungers/push rods - whatever they are called - hold the plungers fully in, so waggling the lever while the car is stood will have no effect. |
--
Skipweasel
Pay no attention to that man behind the curtain.
#18
| |||
| |||
|
|
Curls wrote: I've since found out the valves in the compensator are free, you can remove them....but I can't see anything with the compensator still on the car. I had no problem bleeding the brakes when I put them back... The shoes are free, as is the handbrake cable, the cylinders are OK.... get a good pedal, yet the brakes still won't work. Well, they will very slightly, but it's far from enough. [MOT] failed on the rear brakes not working. After checking everything else, I put it down to the load compensator I tried it all ways [of loading] possible; jacked up under the suspension, under the body, with and without the arm in place, with the valve plungers held at various positions. No change at all. ...is there anyway he/she could check the pressure of the fluid whilst breaking?? |
This article may be helpful.
http://www.babcox.com/editorial/bf/bf40124.htm
Of course, you can improvise something rather than to use the pressure gauge
box set in Fig. 9
--
Lin Chung.
[Replace "the Water Margin" with "ntlworld" for e-mail].
#19
| |||
| |||
|
|
"curls" <invalid (AT) invalid (DOT) com.org> wrote in message news:ag8i82d5r7tl7oisss9dn4khoqlj4pojtq (AT) 4ax (DOT) com... On Thu, 8 Jun 2006 13:25:17 +0100, "MikeL" <aaaa (AT) nowhere (DOT) com> wrote: HFM? I don't know how similar it is the one on my Alfa (a Bendix one) but I can get a new one for about 60quid. That doesn't help for a Micra though. No, it was just to illustrate how much they're taking the piss. It failed on the rear brakes not working. After checking everything else, I put it down to the load compensator. You mentioned that you've bled the brakes. I'm assuming that you're getting fluid out of the rear calipers/drums then? If so, IMO I'd be thinking that the valve is fine and the problem is elsewhere. If you're still convinced it's the valve, perhaps it's worth bypassing it temporarily with some made up pipes just as a test. Problem solved, it's going to the scrappers. She decided the problems |
isn't worth it for a K reg car.
Thanks for all the replies.
|
« Previous Thread
|
Next Thread »
| Thread Tools | Search this Thread |
| Display Modes | |
Linear Mode
| |
Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2008, Jelsoft Enterprises Ltd.
Copyright ©2000 - 2008, Jelsoft Enterprises Ltd.